Door latch



construction,

moa Maca.

` nppfnt'atin ined LMay 1,

Y This 'invention relate'sto door flatchesof thesliding'bolttypeyand hasfor on'eot its objects l'toprovide a novel Idevice of this characterwhich shall be especially adapted for use on barn and cribidoors' and...embodying 4'means adaptedfto prevent the retraction of itsrbolt byhorsesror other cattle and by persons notiamiliar with its mechanism..

With the foregoing-and other objects in view, the invention consists ofthe novel combination and arrangement of parts hereinafter fullydescribed and claimed, and illustrated in the accompanying drawing,wherein:

Figure 1 isV an elevational view illustrating the application of thedoor latch,

Figure 2 is a detail view in rear elevation V of the door latch, v

Figure Sis a sectional view taken on the vertical plane indicated by theline 3-3 of Figure 1,

Figure 4 is a sectional view taken on the vertical plane indicated bythe line 4-4 of Figure 1, and L Figure 5 is a similar view taken on thehorizontal plane indicated by the line 5-5 of Figure 1.

Corresponding and like parts are referred to in the followingdescription, 'and designated in the several views of the accompanyingdrawing, by similar-,reference characters; r1`he latch comprises acasing 1 which, `as shown in the drawing, is adapted to be secured to adoor 2 by bolts 3, and a keeper 4 which isV adapted to be secured to theJframe 5 of the door by bolts 6. The casing 1 is provided with ahorizontal opening 7 in which is slidably mounted a bolt 8, and thekeeper 4 is provided with a recess 9 for the reception of the forwardend of the bolt.l

The rearward end of the bolt 8 projects beyond the casing 1, and isprovided with a knob or handle 10 through the medium of which the boltmay be readily projected or retracted. A pin 11 carried by the-bolt 8and working in a closed end groove 12 in the casing 1, prevents the boltfrom being casually withdrawn from the casing and limits the distancethat the bolt may be moved duringy the` act 'of projecting/ it,L ormoving it into engagement with the keeper 4. The bolt is adapted to besecured in projected position by tumblers 13 and 14 which are slidablymounted invertical openings 15 formed in the casing 1. The openings 15intersect the opening 7 and extend through 1926. serial fNp. 16631131. f

the bottom of the casif'fng 1. 'The tunibler- MEM f is adapted`toi-enter a notch 16 in-thefupper v edge of fthe 'bolt 8, and is:provi-ded with a stem 117 Lextending Y downwardly therefrom and havingVlitsllower end `positioned within tlie-plan'efof `thefcasiiig f1. ...Thetumbler14 is'adapted to engage in a notch 18 in the lupper edge of thebolt 8, and is provided with a stem 19 extending downwardly therefromand having its lower end Vprojecting ybelowthe corresponding end of thecasing 1.

The tumbler 14 is provided with a notch 20 which receives the bolt 8 andis longer than the width of Vthe bolt. A notch 21 is formed in thefloweredge of the bolt 8 for the reception of the tumbler 14 in the event thatthe tumblervshould be liftedtoo high when gianipulating the tulnblers torelease the o t. Y Y

In'practice, the tumblers 13 and 14 rest upon thejupper edge of the bolt8 when the latter is in retracted position. The pin 11 limitsthedistance thatthe bolt 8 may be moved, and when the latter reachesA thelimit of its projected position the notches 16 or 18 will register withthe tumblers 13 and 14 andthe tumblers willv gravitate into'thenotchesand lock the bolt'against retraction by an animalv or personunfamiliar with the manner in which the Vtumblers must be manipula-ted;in order to release the bolt. The tumhlers 13 and 14Vmay be raised intoholt releasing position by engaging the lower end of the stem 17 with akey, which may take the form of a pin, and the lower end of the stem 19with the inger. If the tumbler 14 is raised too high it will engage 'nthe notch 21 in the lower edge of the olt 8.

From the foregoing land accompanying drawing, it willbe apparent thatthe bolt 8 will immediately on-reaching its fully projected position bepositively locked in such position, that a person not familiar with themechanism of the latch cannotl effect the quick release of the bolt 8,and that the latch is simple and durable and may be manufactured andsold at a comparatively low cost.

It shouldbe understood that thedrawing is merely illustrative anddoesvnot Vpretend to give exact proportions. Furthermore, the. saiddrawing is illustrative of a preerred construction, it being myexpectation that various changes and modifications may beV made wi houtdeparting from' the spirit and scopeof my invention,

That `is-claimed is :k Y

l.. A'latch comprising a casing, a bolt Slidably supported by thecasing,- and provided in its upper and lower :edges with notches, 'a keyoperated tumbler, 'Y and a manually operable tumbler, said tumblersbeing adapted to engage in the notches in the 'upper edge of the bolt tosecure the latter in projected position, and themanually operabletumbler being adapted to en- .ga-ger in the notch in the lower edge ofthe bolt provided said tumbler is moved through too .grezfitA aydistance during the operation Vthereof tofefiect the release of thebolt.

2. A latch comprising a casing, a 'bolt Y* nai-21,4137

slidably supported by the easing and provided inV its upper edge with aplurality of notches and in its lower edge with a single Y notch, a lkeyoperated tumbler adapted to engageY in one of the notches in the upperedge of the boltand located Wholly within feo the casing, and a manuallyoperable tumbler 7 adapt-ed to engage in the other notch in the upperedge of the bolt and adapted to be engaged in the notch in the loweredge of the boltprovided it is moved through tooV

